Add ghc-boot-th to rules/foreachLibrary
Add ghc-boot-th to rules/foreachLibrary

This may have been the cause of various build failures on FreeBSD and
Solaris.

mettekou/ghc,sgillespie/ghc,shlevy/ghc,sgillespie/ghc,sdiehl/ghc,sgillespie/ghc,sgillespie/ghc,mettekou/ghc,snoyberg/ghc,vTurbine/ghc,snoyberg/ghc,olsner/ghc,vTurbine/ghc,vTurbine/ghc,sdiehl/ghc,sdiehl/ghc,mettekou/ghc,shlevy/ghc,olsner/ghc,vTurbine/ghc,mettekou/ghc,vikraman/ghc,olsner/ghc,vikraman/ghc,vikraman/ghc,shlevy/ghc,sgillespie/ghc,snoyberg/ghc,snoyberg/ghc,sdiehl/ghc,vTurbine/ghc,olsner/ghc,ezyang/ghc,mettekou/ghc,sdiehl/ghc,sgillespie/ghc,snoyberg/ghc,sdiehl/ghc,olsner/ghc,ezyang/ghc,olsner/ghc,mettekou/ghc,ezyang/ghc,sgillespie/ghc,ezyang/ghc,snoyberg/ghc,vTurbine/ghc,vikraman/ghc,ezyang/ghc,ezyang/ghc,ezyang/ghc,shlevy/ghc,vikraman/ghc,vTurbine/ghc,vikraman/ghc,shlevy/ghc,shlevy/ghc,mettekou/ghc,shlevy/ghc,sdiehl/ghc,snoyberg/ghc,olsner/ghc,vikraman/ghc